1. Department of Obstetrics and Gynecology, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
2. Department of Obstetrics and Gynecology, Chongqing Health Center for Women and Children, Chongqing, China
3. Department of Pathology, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
4. Department of Obstetrics and Gynecology, The First Affiliated Hospital, Shihezi University School of Medicine, Xinjiang, China
5. Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China